U.S. patent number 10,188,145 [Application Number 15/276,712] was granted by the patent office on 2019-01-29 for personal vaporizer having reversing air flow.
The grantee listed for this patent is Lubby Holdings, LLC. Invention is credited to J. Christian Rado.
View All Diagrams
United States Patent |
10,188,145 |
Rado |
January 29, 2019 |
Personal vaporizer having reversing air flow
Abstract
A personal vaporizer has an atomizer module having a heating
element and an atomizer cup for receiving vaporizing medium. A flow
module is releasably attached to the atomizer module. The flow
module intakes ambient air and directs the air into a vaporizing
chamber at and adjacent the atomizer cup, where the air mixes with
atomized medium to form a vapor. The vapor exits the vaporizing
chamber via one or more exit passages defined through the flow
module. Vapor is directed from the exit passages into a mouthpiece
and further into the user's mouth.
Inventors: |
Rado; J. Christian (Torrance,
CA) |
Applicant: |
Name |
City |
State |
Country |
Type |
Lubby Holdings, LLC |
Torrance |
CA |
US |
|
|
Family
ID: |
58387491 |
Appl.
No.: |
15/276,712 |
Filed: |
September 26, 2016 |
Prior Publication Data
|
|
|
|
Document
Identifier |
Publication Date |
|
US 20170086506 A1 |
Mar 30, 2017 |
|
Related U.S. Patent Documents
|
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
|
62232691 |
Sep 25, 2015 |
|
|
|
|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A61M
15/06 (20130101); A24F 47/008 (20130101); H05B
1/0227 (20130101) |
Current International
Class: |
A24F
47/00 (20060101); H05B 1/02 (20060101); A61M
15/06 (20060101) |
Field of
Search: |
;239/77,135,136,138,419.5 ;122/28,40,367.1 ;131/273 |
References Cited
[Referenced By]
U.S. Patent Documents
Other References
International Search Report from USPTO dated Dec. 7, 2016 for
related International Application No. PCT/US2016/053829. cited by
applicant .
Written Opinion from USPTO dated Dec. 7, 2016 for related
International Application No. PCT/US2016/053829. cited by applicant
.
International Preliminary Report on Patentability from the
International Bureau of WIPO dated Apr. 5, 2018 for related
International Application No. PCT/US2016/053829. cited by
applicant.
|
Primary Examiner: Gorman; Darren W
Assistant Examiner: Barrera; Juan C
Attorney, Agent or Firm: Klein, O'Neill & Singh, LLP
Parent Case Text
CROSS-REFERENCE TO RELATED APPLICATIONS
The application claims priority to U.S. Provisional Application No.
62/232,691, which was filed on Sep. 25, 2015, the entirety of which
is hereby incorporated by reference.
Claims
What is claimed is:
1. A personal vaporizer having a distal end and a proximal end, a
distal direction defined moving axially from the proximal end
toward the distal end, a proximal direction being opposite the
distal direction, comprising: an atomizer module comprising an
atomizer cup having a distal wall and a side wall extending in the
proximal direction from the distal wall to a proximal edge, a
heating element being arranged in or adjacent the atomizer cup, the
cup being configured to accept a vaporizing medium so that the
vaporizing medium is atomized when the heating element is
energized; a vaporizing chamber defined in part by the distal and
side walls of the atomizer cup, the vaporizing medium being
contained within the vaporizing chamber; a flow body selectively
attachable to a proximal side of the atomizer module, the flow body
comprising an inlet passage through a side of the flow body, the
inlet passage communicating with a delivery passage that extends in
the distal direction from the inlet passage to a delivery opening,
the delivery passage and delivery opening being defined by the flow
body, the delivery opening being distal of the inlet passage and
proximal of the vaporizing chamber, and being configured to direct
intake air into the vaporizing chamber; an exit passage
communicating with the vaporizing chamber and defined by the flow
body adjacent the delivery passage, and an exit opening
communicating with the exit passage and being proximal of the
vaporizing chamber; and a mouthpiece having a mouthpiece outlet
that is in communication with the exit passage, the mouthpiece
being proximal of the flow body; wherein a vaporizing chamber flow
path is defined within the vaporizing chamber between the delivery
opening and the exit passage, and atomized vaporizing medium
becomes entrained in the air flowing along the vaporizing chamber
flow path so as to form a vapor; and wherein the vaporizer is
configured so that as air is drawn out of the mouthpiece outlet,
air is drawn in through the inlet passage and flows along the
vaporizing chamber flow path.
2. A personal vaporizer as in claim 1, wherein the exit opening is
proximal of the delivery opening.
3. A personal vaporizer as in claim 2, wherein the delivery opening
is distal of the atomizer cup proximal edge.
4. A personal vaporizer as in claim 3, wherein the flow body has a
distal wall, and the delivery opening is formed through the distal
wall, and the vaporizing chamber is defined by the distal and side
walls of the atomizer cup and by the distal wall of the flow
body.
5. A personal vaporizer as in claim 2, wherein a cross-sectional
area of the vaporizing chamber increases along the vaporizing
chamber flow path.
6. A personal vaporizer as in claim 5, wherein delivery of air is
accelerated and directed toward the distal wall of the atomizer cup
and imparts turbulent flow characteristics to the accelerated
air.
7. A personal vaporizer as in claim 2 additionally comprising a
distal vapor chamber distal of the atomizer cup, and a vapor tube
extending proximally from the distal vapor chamber to a
mouthpiece.
8. A personal vaporizer as in claim 7, wherein a cross-sectional
area of the delivery passage decreases moving distally along its
length so that air flowing distally through the delivery passage is
accelerated.
9. A personal vaporizer as in claim 1 additionally comprising an
exit groove formed in the side wall of the atomizer cup, the exit
opening communicating with the exit groove, and wherein the vapor
flows distally through the exit groove.
10. A personal vaporizer as in claim 1, wherein the delivery
opening directs a flow of air towards a center of the atomizer cup
distal wall, and wherein the exit opening is radially spaced from
the center of the atomizer cup.
11. A personal vaporizer as in claim 1, wherein the delivery
opening directs a flow of air towards a first side of the atomizer
cup, and wherein the exit opening is at or adjacent a second side
of the atomizer cup generally opposite the first side.
12. A personal vaporizer as in claim 1, comprising a flow director
extending distally beyond the distal end of the flow body and
additionally comprising a tab extending distally from a distal wall
of the flow director.
13. A personal vaporizer as in claim 1, wherein the flow body has a
distal wall, and the vaporizing chamber is defined by the distal
and side walls of the atomizer cup and by the distal wall of the
flow body.
14. A personal vaporizer as in claim 1, wherein the flow body is
movable as a unit.
15. A personal vaporizer as in claim 14, wherein the mouthpiece is
selectively detachable from the flow body.
16. A personal vaporizer as in claim 14, wherein the delivery
opening of the flow body is distal of the atomizer cup proximal
edge.
17. A personal vaporizer as in claim 14, wherein a cross-sectional
area of the delivery opening is less than a cross-sectional area of
the inlet passage so that intake air is accelerated moving distally
through the delivery passage and delivery opening prior to entering
the vaporizing chamber and prior to contacting vaporizing
medium.
18. A personal vaporizer as in claim 17, wherein the vaporizing
chamber flow path changes direction between the delivery opening
and the exit opening from being distally-directed to being
proximally-directed.
19. A personal vaporizer, comprising: an atomizer module comprising
an atomizer cup having a distal wall and a side wall extending from
the distal wall to a proximal edge, a heating element being
arranged in or adjacent the atomizer cup, the cup being configured
to accept a vaporizing medium so that the vaporizing medium is
atomized when the heating element is energized; a vaporizing
chamber defined in part by the distal and side walls of the
atomizer cup, the vaporizing medium being contained within the
vaporizing chamber; a flow body selectively attachable to the
atomizer module, the flow body comprising an inlet passage through
a side of the flow body, the inlet passage communicating with a
delivery passage that extends distally to a delivery opening, the
delivery opening being distal of the inlet passage and proximal of
the vaporizing chamber, and being configured to direct intake air
into the vaporizing chamber toward the distal wall; an exit passage
communicating with the vaporizing chamber and extending through the
flow body, and an exit opening communicating with the exit passage
and being proximal of the vaporizing chamber; and a mouthpiece
having a mouthpiece outlet that is in communication with the exit
passage; wherein a vaporizing chamber flow path is defined between
the delivery opening and the exit passage, intake air directed into
the vaporizing chamber is redirected by the distal wall or
vaporizing medium to become turbulent, and atomized vaporizing
medium becomes entrained in the turbulent air flowing along the
vaporizing chamber flow path so as to form a vapor; wherein a
cross-sectional area of the delivery opening is less than a
cross-sectional area of the inlet passage so that intake air is
accelerated moving distally through the delivery passage and
delivery opening prior to entering the vaporizing chamber and prior
to contacting vaporizing medium; wherein the vaporizer is
configured so that as air is drawn out of the mouthpiece outlet,
air is drawn in through the inlet passage and flows along the
vaporizing chamber flow path; and wherein the vaporizing chamber
flow path changes direction from being distally-directed to being
proximally-directed between the delivery opening and the exit
opening.
20. A personal vaporizer as in claim 19, wherein the delivery
opening is distal of the exit opening.
21. A personal vaporizer as in claim 19, wherein the flow body has
a distal wall, and the vaporizing chamber is defined by the distal
and side walls of the atomizer cup and by the distal wall of the
flow body.
22. A personal vaporizer as in claim 21, wherein the distal wall of
the flow body is distal of the atomizer cup proximal edge.
23. A personal vaporizer as in claim 19, wherein the vaporizing
chamber has a cross-sectional flow area greater than a
cross-sectional area of the delivery opening.
24. A personal vaporizer as in claim 23, wherein intake air that
was accelerated moving distally through the delivery passage and
delivery opening slows moving through the vaporizing chamber along
the vaporizing chamber flow path.
25. A personal vaporizer as in claim 24, wherein the delivery
passage has an upstream portion and a downstream portion, and
wherein a cross-sectional area of the downstream portion is less
than a cross-sectional area of the upstream portion.
26. A personal vaporizer as in claim 24, wherein the heating
element is contained within the vaporizing chamber, and wherein
accelerated intake air is directed from the delivery opening
towards the heating element within the vaporizing chamber, and the
intake air becomes turbulent within the vaporizing chamber.
27. A personal vaporizer as in claim 24, wherein the vaporizing
chamber flow path comprises a radially-directed portion between a
distally-directed portion and a proximally-directed portion, and
flow is turbulent within the radially-directed portion.
28. A personal vaporizer as in claim 27, wherein vaporizing medium
being heated by the heating element is interposed in the
radially-directed portion.
29. A personal vaporizer, comprising: an atomizer module comprising
an atomizer cup having a distal wall and a side wall extending from
the distal wall to a proximal edge, a heating element being
arranged in or adjacent the atomizer cup, the cup being configured
to accept a vaporizing medium so that the vaporizing medium is
atomized when the heating element is energized; a vaporizing
chamber defined in part by the distal and side walls of the
atomizer cup; a flow body selectively attachable to the atomizer
module, the flow body comprising an inlet passage through a side of
the flow body, the inlet passage communicating with a delivery
passage that extends distally to a delivery opening, the delivery
opening being distal of the inlet passage and being configured to
direct intake air into the vaporizing chamber; a flow director
extending distally beyond the distal end of the flow body and
additionally comprising a tab extending distally from a distal wall
of the flow director, the delivery passage being defined within the
flow director, and the delivery opening is defined through the
distal wall of the flow director; an exit passage communicating
with the vaporizing chamber and extending through the flow body,
and an exit opening communicating with the exit passage and being
radially spaced from the delivery opening; and a mouthpiece having
a mouthpiece outlet that is in communication with the exit passage;
wherein a vaporizing chamber flow path is defined between the
delivery opening and the exit passage, and atomized vaporizing
medium becomes entrained in the air flowing along the vaporizing
chamber flow path so as to form a vapor; and wherein the vaporizer
is configured so that as air is drawn out of the mouthpiece outlet,
air is drawn in through the inlet passage and flows along the
vaporizing chamber flow path.
30. A personal vaporizer as in claim 29, wherein the tab is
disposed adjacent the delivery opening.
31. A personal vaporizer as in claim 30, wherein a distal edge of
the tab is disposed adjacent the heating element in the vaporizing
chamber.
32. A personal vaporizer as in claim 30, additionally comprising a
second tab extending distally from the distal wall of the flow
director, wherein the second tab is disposed adjacent the delivery
opening on a side of the delivery opening opposite the tab.
Description
BACKGROUND
The present disclosure relates to the field of personal
vaporizers.
Personal vaporizers are handheld devices that can vaporize a
vaporizing medium, which vapor is then inhaled by its user. The
vaporization medium can be in the form of a liquid solution or wax,
and can include one or more of various essential oils, such as
cannabis oil. The medium can also include other ingredients such as
extracted flavorings or scents. Personal vaporizers for vaporizing
a liquid typically include a chamber that holds the liquid
solution. The liquid solution is configured to produce the vapor
when heated by the atomizer, and typically includes chemicals such
as one or more of propylene glycol, glycerin, polyethylene glycol
400, cannabis oil, other essential oils, and/or an alcohol.
Extracted flavorings can also be included in the solution.
Electronic cigarettes are a type of personal vaporizer, and use a
liquid solution that often includes tobacco-derived nicotine.
Personal vaporizers include an atomizer that has a heating element
that selectively heats the medium in order to atomize the medium. A
user sucks on a mouthpiece of the vaporizer to draw atmospheric air
into and through the atomizer, where it is mixed with atomized
medium to form a vapor, which is then drawn through the mouthpiece
by the user. Air flow through a vaporizer must be managed in order
to obtain optimal vaporization of the medium.
SUMMARY
There is a need in the art for a personal vaporizer that directs
intake air into and through an atomizer of the vaporizer so as to
mix air with atomized media in order to obtain a high-quality
vapor. There is a further need in the art for a personal vaporizer
configured so that the flow of intake air changes flow direction in
the atomizer.
In accordance with some embodiments, the present specification
provides a personal vaporizer having an atomizer module comprising
an atomizer cup having a distal wall and a side wall extending from
the distal wall to a proximal edge. A heating element is arranged
in or adjacent the atomizer cup, and the cup is configured to
accept a vaporizing medium and to atomize the vaporizing medium
when the heating element is energized. A vaporizing chamber is
defined in part by the distal and side walls of the atomizer cup. A
flow body is selectively attachable to the atomizer module. The
flow module comprises an inlet passage through a side of the flow
body. The inlet passage communicates with a delivery passage that
extends distally to a delivery opening, The delivery opening is
configured to direct intake air into the vaporizing chamber. An
exit passage communicates with the vaporizing chamber and extends
through the flow module. An exit opening communicates with the exit
passage and is radially spaced from the delivery opening. A
vaporizing chamber flow path is defined between the delivery
opening and the exit passage, and atomized vaporizing medium
becomes entrained in the air flowing along the vaporizing chamber
flow path so as to form a vapor.
In some embodiments, the vaporizing chamber flow path changes
direction by 180.degree. between the delivery opening and the exit
opening. In further embodiments the delivery opening is distal of
the exit opening. In still further embodiments, a cross-sectional
area of the delivery opening is less than a cross-sectional area of
the inlet passage so that intake air is accelerated moving distally
through the delivery passage and delivery opening.
In additional embodiments, the exit opening is proximal of the
delivery opening. In some such embodiments, the delivery opening is
distal of the atomizer cup proximal edge. In further embodiments, a
cross-sectional area of the vaporizing chamber increases along the
vaporizing chamber flow path.
Yet additional embodiments comprise an exit groove formed in the
side wall of the atomizer cup, the exit opening communicating with
the exit groove, and the vapor flows distally through the exit
groove.
Further embodiments, additionally comprise a distal vapor chamber
distal of the atomizer cup, and a vapor tube extending proximally
from the distal vapor chamber to a mouthpiece. In some such
embodiments, a cross-sectional area of the delivery passage
decreases moving distally along its length so that air flowing
distally through the delivery passage is accelerated. In additional
embodiments, delivery of accelerated air directed toward the distal
wall of the atomizer cup imparts turbulent flow characteristics to
the accelerated air.
In still further embodiments, the delivery opening directs a flow
of air towards a center of the atomizer cup distal wall, and the
exit opening is radially spaced from the center of the atomizer
cup.
In yet further embodiments, the delivery opening directs a flow of
air towards a first side of the atomizer cup, and the exit opening
is at or adjacent a second side of the atomizer cup generally
opposite the first side.
In yet additional embodiments, a cross-sectional area of the
delivery opening is less than a cross-sectional area of the inlet
passage so that intake air is accelerated moving distally through
the delivery passage and delivery opening.
In still additional embodiments, a flow director extends distally
beyond the distal end of the flow body and a tab extends distally
from a distal wall of the flow director. In some such embodiments,
the delivery passage is defined within the flow director, and the
delivery opening is defined through the distal wall of the flow
director. In further such embodiments, the tab is disposed adjacent
the delivery opening. In still further such embodiments, a distal
edge of the tab is disposed adjacent the heating element in the
vaporizing chamber.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of an embodiment of a personal
vaporizer assembled with a battery;
FIG. 2 is a partial cross-section view of the personal vaporizer of
FIG. 1;
FIG. 3A is a perspective view of an atomizer cup of the personal
vaporizer of FIG. 1;
FIG. 3B is another perspective view of the atomizer cup of FIG.
3;
FIG. 4 is a partial cross-section view of an atomizer module of the
personal vaporizer of FIG. 2;
FIG. 5 is a partial cross-section view of an airflow module and
mouthpiece of the personal vaporizer of FIG. 2;
FIG. 6 is a perspective cross-sectional view of the personal
vaporizer of FIG. 2 taken along line 6-6;
FIG. 7 is a partial sectional view of a personal vaporizer
configured in accordance with another embodiment;
FIG. 8 is a partial sectional view of a personal vaporizer
configured in accordance with yet another embodiment;
FIG. 9 is a partial sectional view of a personal vaporizer
configured in accordance with a further embodiment;
FIG. 10 is a perspective view of still another embodiment of a
personal vaporizer;
FIG. 11 is an exploded view of the personal vaporizer of FIG.
10;
FIG. 12A is a perspective view of an atomizer cup of the personal
vaporizer of FIG. 10;
FIG. 12B is another perspective view of the atomizer cup of the
personal vaporizer of FIG. 10;
FIG. 13 is a cross-sectional view of the atomizer cup of FIG. 12A
taken along line 13-13, and additionally showing a heating
element;
FIG. 14 shows the atomizer cup of FIG. 13 with the heating element
installed;
FIG. 15 is a sectional view of an atomizer module of the personal
vaporizer of FIG. 10;
FIG. 16 is a perspective view of a flow director of the personal
vaporizer of FIG. 10;
FIG. 17 is a cross-sectional view of the flow director of FIG. 16
taken along lines 17-17;
FIG. 18 is a cross-sectional view of the flow director of FIG. 16
taken along lines 18-18;
FIG. 19 is a side view of an inflow body of the personal vaporizer
of FIG. 10;
FIG. 20 is a cross-sectional view of the inflow body of FIG. 19
taken along lines 20-20;
FIG. 21 is a perspective view of the airflow module of the personal
vaporizer of FIG. 10; and
FIG. 22 is a cross-sectional view of the personal vaporizer of FIG.
10 taken along lines 22-22.
DESCRIPTION
With initial reference to FIGS. 1-6, one embodiment of a personal
vaporizer 30 has a proximal end 32 and a distal end 34. A battery
module 40 at the distal end includes a rechargeable battery
enclosed within a battery casing, which battery module 40
preferably supplies electric power for the personal vaporizer. An
atomizer module 50 is selectively attachable to the proximal end of
the battery module and is configured to atomize the medium.
Atomized medium is mixed with air, creating a vapor. An airflow
module 60 is selectively attachable to the proximal end of the
atomizer module 50. The airflow module 50 preferably intakes
ambient air for delivery to the atomizer module 60, and receives
vapor from the atomizer module 60. A mouthpiece 62 is provided to
direct vapor into a user's mouth.
With specific reference to FIGS. 2 and 3, the illustrated atomizer
module 50 comprises an atomizer cup 64 held within an atomizer case
66. The atomizer cup 64 has a cup opening 68 that is configured to
receive a vaporizing medium M such as a wax. With particular
reference to FIGS. 2-4, the atomizer cup 64 includes a generally
circumferential cup wall 70 and a bottom wall 72. The cup opening
68 is adjacent a top or proximal surface 74 of the cup wall 74 so
as to define a space to hold vaporizing medium M, particularly a
solid or semi-solid medium such as a wax. In the illustrated
embodiment, the atomizer cup 64 includes a center wall 76 that
defines a center aperture 78. As such, in the illustrated
embodiment, medium M is held within the atomizer cup 64 in the
space defined between the center wall 76, bottom wall 72 and cup
wall 70.
In the illustrated embodiment, exit grooves 80 are formed in the
cup wall 70 on opposite sides of the atomizer cup 64. The exit
grooves 80 preferably are elongated and define a passage 82 from
the top surface 74 of the atomizer cup 64 to and beyond the bottom
wall 72. When the atomizer cup 64 is mounted within the atomizer
case 66, an exit passage 82 is defined between the exit groove 80
and the adjacent atomizer case 66.
In the illustrated embodiment, the atomizer cup 64 includes a
heating element (not shown). In a preferred embodiment, the
atomizer cup 64 is formed of a ceramic material, and the heating
element, such as a resistance wire, is encased within the ceramic.
When the resistance wire is energized, it heats quickly, and
correspondingly heats the ceramic cup, which in turn heats and
atomizes the medium within the cup. In the illustrated embodiment,
the atomizer cup includes two resistance wires encased therewithin.
Each atomizer wire extends between a bottom wire interface 84 and a
wall wire interface 86.
Energy is provided to the resistance wires by applying a voltage
across one of the bottom wire interfaces 84 and its corresponding
wall wire interface 86. More specifically, in the illustrated
embodiment, the bottom wire interface 84 comprises an electrode
communicating with the resistance wire that is encased within the
atomizer cup, and the wall wire interface 86 includes an electrical
node communicating with an opposite end of the resistance wire.
In the illustrated embodiment, the bottom and wall wire interfaces
84, 86 are illustrated as electrical nodes. In other embodiments,
it should be appreciated that the interfaces may include wires
extending from the atomizer cup 64. In still further embodiments,
the atomizer cup may include a heating element that is not encased
within the cup. For example, wire coils may be arranged within the
cup between the cup wall, bottom surface and center wall.
With continued reference to FIGS. 2-4 and additional reference to
FIG. 6, the atomizer cup 64 preferably is mounted within the
atomizer case 66 so as to engage the case. Most preferably, the
wall wire interfaces 86 tightly engage the atomizer case 66, which
preferably is constructed of an electrically conductive material. A
connector pin 88 is provided at the distal end of the atomizer
module 50 for physically and electrically connecting to the battery
module 40. An outer pin portion 90 of the connector pin 88 is
attached to and in electrical communication with the atomizer case
66. The outer pin portion 90 preferably is sized and shaped to
engage a proximal connector of the battery module 40. For example,
in some embodiments the outer pin portion 90 is threaded so as to
be threadable onto such a battery module proximal connector. As
such, the outer pin portion 90 is physically and electrically
connected with an outer (second) node of the battery.
A connector 92 of the personal vaporizer 30 has a proximal end that
engages the bottom wire interfaces 84 of the atomizer cup 64. The
connector 92 preferably is electrically conductive, and extends
distally so that an inner pin portion 94 of the connector 92
engages an inner (first) node of the battery module 40. An
insulator sleeve 96 is disposed between the connector 92 and the
outer pin portion 90 to electrically isolate the connector 92 from
the outer pin portion 90. Preferably, when the vaporizer 30 is
attached to the battery, the inner pin portion 94 engages the inner
node of the battery while the outer pin portion 90 engages the
outer node of the battery, which inner and outer nodes of the
battery preferably have opposite polarity
The proximal end of the connector 92 is engaged with the bottom
wire interface 84. Thus, electric current is delivered to the
heating element of the atomizer cup 64 from the battery 40 through
the connector 92 and the bottom wire interfaces 84. After flowing
through the heating element, electrical current flows through the
wall wire interfaces 86 and into the atomizer case 66, from which
it flows to the outer pin portion 90 and the second node of the
battery module 40. As such, a circuit is provided to supply
electrical energy from the battery module 40 to the heating
element.
As shown, the connector 92 has a diameter less than that of the
atomizer cup 64 so that a bottom chamber 98 is defined between an
outer surface of the connector 92 and the inner surface of the
atomizer case 66 below the bottom wall 72 of the atomizer cup 64.
The exit passages 82 of the atomizer cup 64 communicate with this
bottom chamber 98. One or more vapor openings 99 are defined in the
connector 92, which is also aligned with a vapor tube 100. The
vapor tube 100 communicates with the bottom chamber 98 through the
connector vapor openings 98. The vapor tube 100 is an elongated
tube that extends through the atomizer cup center aperture 78 and
is supported by the atomizer cup center wall 76. A proximal end of
the vapor tube 100 can be threaded so that it can be connected to a
mouthpiece interface 101.
With additional reference to FIG. 5, the airflow module 60
preferably is releasably connected to the atomizer module 50 such
as by a threaded connection. As such, the user can remove the
airflow module 60 so as to load vaporizing medium M into the
atomizer cup 64. An airflow insert 102 includes a pair of inlet
passages 104 that open to a side of the vaporizer. A delivery
passage 106 is defined centrally within the airflow insert 102 and
communicates with both inlet passages 104. As shown, the airflow
insert 102 includes an elongated passage 108 that is sized and
configured to accommodate the vapor tube 100 extending
therethrough. The delivery passage 106 is defined between the vapor
tube 100 and the walls of the elongated passage 108. In the
illustrated embodiment, a downstream or distal opening 110 of the
delivery passage 106 has a cross-sectional area that is less than
the cross-sectional area of the delivery passage 106 at and
adjacent the inlet passages 104. In a preferred embodiment, the
distal opening 110 of the delivery passage 106 is sized and
configured so that a total cross-sectional area of the delivery
passage at the distal opening 110 is less than the combined
cross-sectional area of the inlet passages 104. As such, airflow is
accelerated moving distally through the delivery passage 106.
The distal opening 110 is formed through a distal wall 112 of the
airflow insert 102. The distal wall 112 preferably extends
generally transversely to an axis of the airflow module 60.
With continued reference to FIGS. 2 and 4-6, in the illustrated
embodiment, the airflow insert 102 is threaded at its distal end so
as to engage the proximal end of the atomizer casing 66. A stop 114
of the airflow insert 102 is configured to engage the proximal end
of the atomizer case 66 so as to prevent the airflow insert 102
from being inserted too far distally into the atomizer case 66. As
such, when connected, the distal wall 112 of the airflow insert 102
is positioned generally above, or proximal, the top or proximal
edge 74 of the cup 64, and a vaporizing chamber 120 is defined
between the atomizer cup 64 and the distal wall 112. It is to be
understood, however, that in other embodiments the airflow insert
102 can be configured so that the distal wall 112 extends distally
through the atomizer cup opening 68.
In the illustrated embodiment, the airflow insert 102 has a
circumferential groove into which a throttle ring 122 is movably
received. The throttle ring 122 includes two inlet apertures 124
that selectively align with the inlet passages 104. In some
embodiments the throttle ring 122 can be rotated about the airflow
insert 102 to vary the degree of alignment between the throttle
ring inlet apertures 124 and the inlet passages 104. As such,
rotation of the throttle ring 122 can selectively restrict flow
into the inlet passages 104. In some embodiments, the throttle ring
122 can be ratcheted. In other embodiments there may be no throttle
ring.
Continuing with reference to FIGS. 2, 5 and 6, an upper case or
mouthpiece interface 101 can be attached to the proximal end of the
airflow insert 102 such as by a removable threaded connection or,
in other embodiments, a permanent connection such as adhesive or
press-fitting. The mouthpiece interface 101 engages the proximal
end of the vapor tube 100 and supports the mouthpiece 62. The
mouthpiece 62 communicates the vapor tube 100 with an outlet 128
through which vapor V may flow.
With particular reference next to FIGS. 2 and 6, during operation,
a user depresses a button (not shown) on the battery module 40 in
order to activate the heating element, which thus heats a
vaporizing medium M such as a wax disposed within the atomizer cup
64. Preferably, the medium is heated sufficiently that it atomizes.
The user also engages the mouthpiece and sucks so as to establish a
vacuum at the outlet 128. Ambient air A from outside the personal
vaporizer 30 is drawn through the throttle inlets 124 into the
inlet passages 104 and further into the delivery passage 106. Air
within the delivery passage 106 is directed distally through the
cup opening 68 and into the cup 64. Since the cross-sectional area
of the delivery passage 106 decreases moving distally, the intake
air A is accelerated as it flows through the delivery passage 106.
The accelerated air A is directed into the vaporizing chamber 120,
where it contacts and/or is mixed with medium M that is being
heated and atomized by the heating element. The atomized medium M
mixes with and becomes entrained into the air A, creating a vapor
V.
As shown in the illustrated embodiment, accelerated ambient air A
is directed by the delivery passage 106 in a distal direction into
the atomizer cup 64 at or adjacent the center wall 76 of the
atomizer cup 64. As the accelerated air A contacts the cup 64
and/or vaporizing medium M, the flow becomes at least partially
turbulent. Also, the vacuum created by the user sucking on the
mouthpiece 62 draws air to and through the exit grooves 80.
However, air flow within the vaporizing chamber 120 is
comparatively slowed after exiting the delivery passage 106.
Further, the air flow path extends from the center wall 76 radially
outwardly and also proximally over the top or proximal surface 74
of the atomizer cup 64 to get to the exit grooves 80. Thus, the air
flow path includes dramatic direction changes within the vaporizing
chamber 120 and follows a fairly long flow path through the
vaporizing chamber. In the illustrated embodiment, the air flow
changes direction about 90.degree. or more once it exits the
delivery passage 106, and changes direction another about
90.degree. to extend proximally to the exit grooves 80. Thus, the
air flow path changes direction about 180.degree. within the
vaporizing chamber 120. Factors such as the turbulent flow, slowing
of the flow 180.degree. direction changes, and a relatively long
flow path each contribute to extending the period in which air A is
in contact with the atomized vaporizing medium M within the
vaporizing chamber 120. Such extended contact results in greater
entrainment of atomized medium with the air, thus creating a more
concentrated higher quality vapor V than in prior art personal
vaporizers.
The vapor V is drawn proximally within the vaporizing chamber 120
and over the proximal surface 74 of the cup 64 to the exit grooves
80, through which it is drawn distally and past the atomizer cup 64
into the bottom chamber 98 defined distal of the atomizer cup 64.
Vapor V within the bottom chamber 98 flows through the vapor
openings 99 of the connector 92 and is drawn into the vapor tube
100, through which it flows proximally to the mouthpiece 62 and out
of the mouthpiece outlet 128.
With reference next to FIG. 7, another embodiment is illustrated
schematically. In this embodiment, an airflow insert 130 is
threadingly engaged with a casing 132. The airflow insert 130 is
generally elongated, extending from a proximal wall 134 to a distal
wall 136. Inlet passages 138 open through a side of the airflow
insert 130 and communicate ambient air A to a delivery passage 140,
which is positioned generally centrally, or axially, within the
airflow insert 130. As shown, the delivery passage 140 is tapered
so as to accelerate air flowing distally therethrough, and
terminates at a distal opening 144 defined at a delivery tip 146. A
vaporization chamber 142 is defined between an atomizer cup 150 and
the distal wall 136 of the airflow insert 130. A vaporizing medium
M, such as a wax, can be disposed within the atomizer cup 150 and
vaporized by a heating element of the atomizer cup 150.
Continuing with reference to FIG. 7, in the illustrated embodiment,
the delivery tip 146 extends distally from the distal wall 136 of
the airflow insert 130. Thus, the distal opening 144 of the
delivery passage 140 is distal of the distal wall 136. As shown,
intake air A that is accelerated into the vaporization chamber 142
flows into and through wax M that is being atomized, so that the
atomized wax becomes entrained therein, forming a vapor V.
Preferably, exit passages 152 are formed through the airflow insert
130, and the vapor V from the vaporization chamber 142 can flow
proximally through the exit passages 152, preferably eventually
being directed to a mouthpiece and outlet (not shown). Preferably,
exit passage openings 153 are formed through the distal wall of the
airflow insert 130 and positioned so that intake air must flow
radially outwardly within the vaporization chamber 142 from its
injection point to its exit point, increasing the entrainment of
atomized wax into the air and improving vapor quality.
Additionally, and as shown, the air injection point (the distal
opening 144 the delivery passage 140) in the illustrated embodiment
is distal of the exit passage openings 153. Further, as shown, the
flowpath includes a redirection by 180.degree. within the
vaporization chamber 144.
In the illustrated embodiment, the position of the airflow insert
130 relative to the cup 150 can be adjusted such as by threadingly
rotating the insert 130 within the casing 132. For example, the
airflow insert 130 can be threadingly advanced further distally or
proximally within the casing 132 from its position as shown in FIG.
7. If threaded further distally, it can be advanced distally until
a stop surface 154 of the insert 130 engages the top or proximal
surface 154 of the atomizer cup 150. In such a position, the distal
opening 144 of the delivery passage 140 would be disposed well
below the uppermost part of the wax medium disposed within the
atomizer cup 150. As such, accelerated intake air A is injected
directly into the wax M that is being atomized. Further, when
moving the airflow insert 130 distally, the distal wall 136 of the
insert 130 is positioned quite close to the atomizer cup 150,
effectively creating a relatively small vaporizing chamber 142,
which can also affect vapor quality. This enables a user to
customize the volume of the vaporizing chamber 142 and the position
of ambient air injection within the vaporizing chamber 142 by
adjusting the position of the airflow insert 130 relative to the
casing 132.
In the illustrated embodiment, inlet openings 158 are formed
through the casing 132 so as to align with the inlet passages 138
of the airflow insert 130. Preferably, however, the diameter of the
inlet openings 158, or at least the distance between the
proximal-most and distal-most edges of the inlet openings 158, is
greater than a diameter of the inlet passages 138 so that the inlet
passages 138 remain unobstructed by the casing 132 over a range of
advancement of the airflow insert 130 relative to the casing
132.
With reference next to FIG. 8, yet another embodiment is depicted
schematically. In this embodiment, an airflow insert 160 has a side
opening 162 aligned with an inlet aperture 164 of a casing 166. The
side opening 162 leads to a tapered delivery passage 168 having a
distal opening 170 generally aligned with a side wall 172 at a
first side 174 of an atomizer cup 180. An exit groove or passage
182 is defined through the atomizer cup 180 at a second side 184 of
the cup 180 opposite the delivery passage opening 170. In the
illustrated embodiment, a distal wall 186 of the airflow insert 160
is distal of the top, or proximal, edge 188 of the atomizer cup
180. A vaporizing chamber 190 is defined between a cup 180 and the
distal wall 186 of the insert 160.
Continuing with reference to FIG. 8, ambient air A is drawn through
the side opening 162 and accelerated distally through the delivery
passage 168 into the atomizer cup 180 at the first side 174 of the
vaporizing chamber 190. As the accelerated air A contacts the
atomizer cup 180 and/or vaporizing medium M, it is redirected and
becomes at least partially turbulent. Also, air flow substantially
slows within the vaporizing chamber 190, which has a
cross-sectional area much greater than the delivery passage 168
distal opening 170. Due to the vacuum from the user sucking on the
mouthpiece, the air is drawn from the first side 174 of the
vaporizing chamber 190 to the exit groove 182 at the second side
184. As it flows through the vaporizing chamber 190 the air A flows
through an atomized wax medium M, which becomes entrained in the
air so as to form a high-quality vapor V. The vapor V flows
proximally over the top edge 188 of the cup 180 and then distally
through the exit groove 182 to a bottom vapor chamber 192 distal of
the atomizer cup 180. The vapor then enters a vapor tube 194 which
directs it proximally toward an outlet.
With reference next to FIG. 9, a still further embodiment is
depicted schematically, which embodiment shares some similar
structure with other embodiments. In this embodiment, an airflow
insert 160 has a side opening 162 aligned with an inlet aperture
164 of a casing 166. The side opening 162 leads to a tapered
delivery passage 168 having a distal opening 170 generally aligned
with a side wall 172 at a first side 174 of an atomizer cup 180. An
exit passage 196 is defined within the insert 160 and arranged at
or adjacent a second side 184 of the cup 180 opposite the delivery
passage opening 170. In the illustrated embodiment, a distal wall
186 of the airflow insert 160 is distal of the top, or proximal,
edge 188 of the atomizer cup 180 adjacent the first side 174, but
the distal wall 186 is tapered moving towards the second side 184.
A vaporizing chamber 190 is defined between the cup 180 and the
distal wall 186 of the insert 160. Due to the tapered distal wall
186, the cross-sectional area of the vaporizing chamber 190
increases moving from the first side 174 to the second side
184.
Continuing with reference to FIG. 9, ambient air A is drawn through
the side opening 162 and accelerated distally through the delivery
passage 168 into the atomizer cup 180 at the first side 174 of the
vaporizing chamber 190. As the accelerated air A contacts the
atomizer cup 180 and/or vaporizing medium M, it is redirected and
becomes at least partially turbulent. Also, air flow substantially
slows within the vaporizing chamber 190, which has a
cross-sectional area much greater than the delivery passage 168
distal opening 170. Due to the vacuum from the user sucking on the
mouthpiece, the air is drawn from the first side 174 of the
vaporizing chamber 190 to the exit groove 182 at the second side
184. As it flows through the vaporizing chamber 190 the air A flows
through an atomized wax medium M, which becomes entrained in the
air so as to form a high-quality vapor V. Since the cross-sectional
area of the vaporizing chamber 190 increases moving from the first
side 174 to the second side 184, airflow is further slowed, leading
to even better entrainment of medium M into the air A. After
passing through the vaporizing chamber 190, the vapor V is drawn
proximally through the exit passage 196 toward an outlet.
With reference next to FIGS. 10-22, another embodiment of a
personal vaporizer 200 has a proximal end 202, a distal end 204, an
atomizer module 210, a flow module 220, and a mouthpiece module
222. The atomizer module 210 is selectively attachable to a battery
and is configured to atomize the vaporizing medium. Atomized medium
is mixed with air, creating vapor, in the atomizer module 210. The
flow module 220 is selectively attachable to the proximal end of
the atomizer module 210. The flow module 220 intakes ambient air,
delivers air to the atomizer module 210, receives vapor from the
atomizer module, and communicates the vapor to the mouthpiece
module 222. The mouthpiece module 222 attaches to the proximal end
of the flow module 220 and is configured to receive vapor from the
flow module and direct the vapor into a user's mouth. In some
embodiments, all or part of the mouthpiece module may be
incorporated into the flow module.
With specific reference to FIGS. 11-15, the illustrated atomizer
module 210 comprises an atomizer cup 230 that fits within an
atomizer casing 232. A connector pin 234 and an insulating sleeve
236 also fit within the casing 232 distal of the cup 230, and a
heating element 240 fits within the atomizer cup 230. In the
illustrated embodiment, a spacing ring 242 fits within the casing
232 proximal of the cup 230.
The atomizer cup 230 includes a transverse wall 244 and a
circumferential side wall 246 having a top or proximal edge 248 and
a bottom or distal edge 250. A cup opening 252 is defined adjacent
the proximal edge 248 of the cup side wall 246. The atomizer cup
230 is configured to receive a vaporizing medium M such as a wax.
First and second apertures 254, 256 are formed through the
transverse wall 244. A heating element seat 258 is formed in the
proximal side of the transverse wall 244. Similarly, a distal
recess 260 is formed on the distal side of the transverse wall 244.
As such, the circumferential distal edge 250 of the side wall 246
encircles the distal recess 260 of the transverse wall 244. A
groove 262 is formed through the side wall 246 and is aligned with
the first aperture 254.
With particular reference to FIGS. 13 and 14, the illustrated
heating element 240 comprises a ceramic disc with a resistance wire
encased therewithin. First and second nodes 264, 266 extend from
the ceramic disc in order to allow electrical contact with opposing
ends of the encased wire. Preferably a first wire 268 is soldered
or otherwise attached to the first node 264, and a second wire 269
is soldered or otherwise attached to the second node 266. As best
shown in FIGS. 13 and 14, during manufacture, the heating element
240 is advanced through the cup opening 252 and placed in the
heating element seat 258. The first and second wires 268, 269
extend through the first and second apertures 254, 256,
respectively. The first wire 268 preferably is then formed to fit
through and within the groove 262 so that it extends radially
outwardly of the side wall 246. The second wire 269 preferably is
bent radially inwardly to fit adjacent the transverse wall 244.
With particular reference to FIGS. 11 and 15, in the illustrated
embodiment, the connector pin 234 preferably is elongated and
formed of an electrically conductive material such as a metal. A
ring portion 270 of the connector pin 234 has an increased diameter
relative to other portions of the connector 234. The insulating
sleeve 236 preferably is electrically nonconductive and is shaped
complementarily to the connector 234 and its ring portion 270.
During manufacture, preferably the insulating sleeve 236 is engaged
with the connector pin 234, and the connector and sleeve are
advanced into the atomizer casing 232 so that the sleeve and
connector are received into a connector seat 272 defined within the
casing 232. As shown, the connector pin 234 is either spaced from
the casing 232 or electrically insulated therefrom by the
insulating sleeve 236. In the illustrated embodiment, the connector
pin 234 extends distally of the distal end 202 of the
casing/personal vaporizer 200. Preferably, the distal end 202 is
configured to attach to a mount boss of a typical battery so that
the connector pin 234 and casing 232 engage battery nodes having
opposing polarity.
Once the connector pin 234 is in place, the assembled atomizer cup
230 and heating element 240 are advanced into the casing 232 so
that the distal edge 250 of the cup side wall 246 engages a step
274 on the casing 232. At this position, the atomizer cup 230 is
adjacent the connector pin 234 so that the second wire 269 is
sandwiched between the connector pin 234 and the transverse wall,
but the first wire 268 is sandwiched between the atomizer cup side
wall 246 and the casing 232 and is not in contact with the
connector pin 234. As such, the second wire 269 is electrically
connected to the connector pin 234, but the first wire 268 is
electrically connected to the casing 232 which, in the illustrated
embodiment, is formed of an electrically conductive material. In
this arrangement, a current flow path is defined from the battery
through the connector pin 234 and second wire 269 to the heating
element 240, where it energizes the resistance wire to create heat.
Electric current continues from the heating element 240 to the
first wire 268 and further to the casing 232, from which the
current returns to the battery.
Continuing with reference to FIG. 15, the spacer ring 242
preferably is placed atop the atomizer cup 230 within the casing
232. In some embodiments, the spacer ring 242 is press fit or
otherwise arranged within the casing, and helps maintain the
position of the cup and other components within the casing. Other
embodiments may not employ such a spacer ring.
With reference next to FIGS. 10, 11, and 16-18, the flow module 220
comprises an elongated flow body 280 having a plurality of inlet
passages 282 that open through a side of the flow body 280 and lead
to an inlet center space 284 defined within the flow body 280 and
along an axis of the vaporizer 200. The inlet center space 284
includes a receiver portion 286. A distal end of the flow body 280
defines an internally threaded opening 288 that is configured to
engage the proximal threads of the atomizer casing 232. A plurality
of exit passages 290 are also formed within the flow body 280. The
exit passages 290 are radially spaced from the axis, but extend in
a generally axial direction and do not intersect the inlet passages
282. As such, the exit passages 290 communicate the opening 288
with a proximal mouthpiece receiver 292 formed within the flow body
290.
With additional reference to FIGS. 19 and 20, an elongated flow
director 300 includes a stepped proximal end 302 configured to be
received into the receiver 286 of the inlet center space 284. In
the illustrated embodiment, the flow director 300 is press-fit into
the receiver 286. In other embodiments the flow director could be
threaded, adhered, or otherwise connected to the flow body. A
delivery passage 304 is defined within the flow director 300 and
extends from the proximal end 302 to a downstream opening 310
formed through a distal wall 312. The delivery passage 304
communicates with the inlet center space 284 and extends along the
axis of the vaporizer 200. A pair of tabs 320 extend distally from
the distal wall 312 of the flow director 300. In the illustrated
embodiment one of the tabs 320 is disposed on each side of the
downstream opening 310 of the delivery passage 304 so that the tabs
320 straddle the downstream opening 310. In the illustrated
embodiment, each tab 320 has a generally triangular shape in
cross-section, terminating at an acute-angled distal edge 322.
In the illustrated embodiment, an upstream portion 324 of the
delivery passage 304 has a greater diameter than a downstream
portion 326 of the delivery passage 304. In some embodiments, the
cross-sectional area of the upstream portion 324 of the delivery
passage is about the same as the collective cross-sectional area of
the inlet passages 282. However the cross-sectional area of the
downstream portion 326 of the delivery passage 304 is substantially
less than the collective cross-sectional area of the inlet passages
282.
With additional reference to FIGS. 11 and 22, a mouthpiece base 330
is received into the mouthpiece receiver 292, and sealingly secured
therein with the assistance of a sealing O-ring 332. A mouthpiece
334 is received and held within the mouthpiece base 330. The
mouthpiece defines an outlet 336.
With particular reference to FIG. 21, when the flow module 220 and
mouthpiece module 222 are assembled, they comprise a flow assembly
that can easily be detached from the atomizer module 210. As shown,
the flow director 300, and particularly the flow director tabs 320,
extend distally outwardly from the flow body 280. As such, the user
may disconnect the flow assembly from the atomizer module and,
using a scooping action, apply a medium M, such as a wax, onto the
tabs 320 without using an external implement such as a spoon or the
user's own fingers. The flow assembly can then be reattached to the
atomizer module by threading the flow body onto the atomizer
casing.
With reference next to FIG. 22, the flow director 300 and atomizer
cup 230 preferably are configured so that, when assembled as shown,
the distal edges 322 of the tabs 320 are immediately proximal of
the heating element 240 within the atomizer cup 230. In this
manner, medium M that has been scooped with the tabs 320 is placed
immediately adjacent the heating element 240, and in prime position
for atomization by the heating element. Also, the outer diameter of
the flow director 300 is less than an inner diameter of the
atomizer cup 230 so that an exit space 340 is defined between the
flow director 300 and the atomizer cup side wall 246. A vaporizing
chamber 342 is defined between the flow director distal wall 312
and the heating element 240. As such, in the illustrated
embodiment, the downstream opening 310 opens into a center of the
vaporizing chamber 342, along the axis of the vaporizer 200, and
the exit space 340 is aligned with the radially outermost portion
of the vaporizing chamber 342.
With continued reference to FIG. 22, during use, the user actuates
delivery of current through the heating element 240 to atomize the
medium M, and also draws a breath through the mouthpiece 334. As
such, ambient air A is drawn into and through the inlet passages
282 into the inlet center space 284, from which it is directed into
and through the delivery passage 304. Due to the reduced
cross-sectional area of the downstream portion 326 of the delivery
passage 304, intake air A is accelerated significantly when moving
through the delivery passage 304. Also, as the tabs 320 straddle
the downstream opening 310, this accelerated intake air A directly
impacts the vaporizing medium M, which is simultaneously being
atomized by the heating element 240.
Due to being redirected by the medium M and/or contact with the
heating element 240, the accelerated air A tends to become
turbulent just after entering the vaporizing chamber 342. Also, the
airflow slows substantially after it enters within the vaporizing
chamber 342, which has a cross-sectional flow area much greater
than that of the downstream opening 310. Further, such air A is
drawn radially outwardly to an outer edge of the vaporizing chamber
342, during which time atomized medium M becomes entrained in the
air A, creating a high-quality vapor V. The vapor V is then drawn
proximally through the exit space 340 and further proximally
through the exit passages 290 of the flow body 280 into the
mouthpiece receiver 292, from which it is drawn through the
mouthpiece 334 and out of the mouthpiece outlet 336 to the user's
mouth.
As shown, and as in other embodiments disclosed herein, intake air
A is accelerated into the vaporizing chamber 342. Within the
vaporizing chamber, the intake air will follow a flow path having
dramatic direction changes. For example, the flow path within the
vaporizing chamber 342 from the downstream opening 310 to and into
the exit space 340 changes direction by 180.degree.. Also, flow
path velocity slows substantially within the vaporizing chamber
342.
Embodiments disclosed herein have been shown with generally
circular cross-sections. It is to be understood, however, that
other embodiments may employ the concepts and aspects described
herein but have different cross-sectional shapes. For example,
vaporizers having square or rectangular cross-sectional shapes may
advantageously employ the aspects described in the embodiments
disclosed in this specification.
The embodiments discussed above have disclosed structures with
substantial specificity. This has provided a good context for
disclosing and discussing inventive subject matter. However, it is
to be understood that other embodiments may employ different
specific structural shapes and interactions, and may employ various
combinations of aspects discussed in the above embodiments.
Although inventive subject matter has been disclosed in the context
of certain preferred or illustrated embodiments and examples, it
will be understood by those skilled in the art that the inventive
subject matter extends beyond the specifically disclosed
embodiments to other alternative embodiments and/or uses of the
invention and obvious modifications and equivalents thereof. In
addition, while a number of variations of the disclosed embodiments
have been shown and described in detail, other modifications, which
are within the scope of the inventive subject matter, will be
readily apparent to those of skill in the art based upon this
disclosure. It is also contemplated that various combinations or
subcombinations of the specific features and aspects of the
disclosed embodiments may be made and still fall within the scope
of the inventive subject matter. For example, structure or
resembling the tabs in FIG. 22 may be used in embodiments such as
are discussed in conjunction with FIGS. 1-6, 7, 8 and 9, and the
embodiment discussed in connection with FIGS. 10-22 may be modified
to incorporate one or more aspects described in connection with
other embodiments. Accordingly, it should be understood that
various features and aspects of the disclosed embodiments can be
combined with or substituted for one another in order to form
varying modes of the disclosed inventive subject matter. Thus, it
is intended that the scope of the inventive subject matter herein
disclosed should not be limited by the particular disclosed
embodiments described above, but should be determined only by a
fair reading of the claims that follow.
* * * * *